As described, cristal clear semi-natural pools to swimm in with some small fish in them too. Lots of shady trees around and some food stalls (which were closed when we were there).
Big dusty parking lot you can camp, unfortunately lots of garbage around when we were there. Toilets available but no showers. Hardly any cell phone reception. Had to pay 15 Pesos/person for the entrance, camping was then free of charge. If using the pools the next day again and not leaving early in the morning you have to pay the fee again.
Location: 16.53569, -95.20145